SCMD Series Isolated Miniature Digital I/O Modules

Dataforth SCMD miniature digital I/O modules are solid-state devices that send "on" and "off" electrical signals to and from a computer. Input modules convert AC or DC voltages to DC logic signals and send them to the computer system. Output modules work in the opposite direction, switching either AC or DC circuits "on" or "off" in response to logic-level voltage commands from the computer.

SCMD digital input modules provide highly reliable and safe interfaces to harsh industrial measurement and control applications. With SCMD modules installed near individual field signals, a reliable isolation barrier is provided between the field wiring and the computer system. Other benefits include the reduction of field wiring costs and the establishment of a cost-effective and manageable method for system expansion and repair. The SCMD-MIAC and SCMD-MIDC miniature input modules are used for sensing "on" and "off" AC or DC voltage levels in the ranges 10 V_AC to 60 V_AC, 90 V_AC to 140 V_AC, and 180 V_AC to 280 V_AC, and 3.3 V_DC to 32 V_DC and 10 V_DC to 60 V_DC. High-voltage, low-voltage, fast-switching, and low-noise options are available, designated by suffixes "A", "E", "F", and "N" respectively.

SCMD-MOAC and -MODC miniature output modules accept 5 V_DC or 24 V_DC inputs and provide several different output ranges, including 12/24 V_AC to 140/280 V_AC and 0/3/5 V_DC to 50/60/200 V_DC. Fast switching and other special options are available. SCMD-MORO and -MORC miniature relay output modules are used for switching AC and DC loads up to 125 V_RMS or 100 V_DC at a maximum of 30 W_DC or 62.5 VA.

Several different back panel offerings ranging from 4-channel to 24-channel are available for mounting SCMD-M digital input modules if users do not want to design their own PCB board.